public class Example23{
	public static void main(String[] args){
	int sum1 = add(1,2);
	int sum2 = add(1,2,3);
	double sum3 = add(1.2,2.1);
	
	System.out.println("sum1 = "+sum1);
	System.out.println("sum2 = "+sum2);
	System.out.println("sum3 = "+sum3);	
	}
	
	public static int add(int x,int y){
		return x+y;
	}
	public static int add(int x,int y,int z){
		return x+y+z;
	}
	public static double add(double x,double y){
		return x+y;
	}
}